Vortex ring structure at late stages of formation
نویسندگان
چکیده
High resolution DPIV measurements are made of a vortex ring formed by a piston/cylinder mechanism ~Reynolds number 3700 and 7500!. A complex ring structure is identified. The stopping condition of the piston leads to vortical fluid collecting near the forward stagnation point of the ring. In addition, the roll-up of the core produces a vorticity distribution that departs from a simple Gaussian profile. © 1997 American Institute of Physics. @S1070-6631~97!01809-6#
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